High-strength bolts for buildings and bridges 1.Materials: low carbon alloy ... Elastic rail clips2, Dog spikes, square head screw spikes, timber drive spikes, T-bolts, fish bolts, switch & crossing ... railway bridges, airport hangar, port machinery, high-rise buildings, civil span. Structural steel tower masts and other friction ... industry Torshear Bolts Type High Strength Bolt for buildings and bridges